Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out

Iowa Utility Energy Efficiency

VIEWS: 99 PAGES: 13

									Iowa Utility Energy Efficiency – Information presented by the Iowa Utilities Board to the Iowa House and Senate Commerce Subcommittees.
• • NOTES AND CAVEATS. For contacts or to discuss the information, see the final slide. All tables and charts in this presentation were compiled by the staff of the Iowa Utilities Board (IUB) from data provided in reports by Iowa utilities. The reports include: the results of evaluations supporting cost recovery filings for investor-owned utilities (IOUs), evaluations supporting performance reviews for investorowned utility energy efficiency plans, data compiled and submitted annually by investor-owned utilities, biennial reports on the plans of municipal utilities and retail electric cooperatives, and responses by utilities to data requests of the Iowa Utilities Board. IUB staff have compiled and in some cased reformatted the utilities’ data. No formal evaluation of the data has been performed by the staff of the Iowa Utilities Board, but some of the data has been subjected to formal contested review in cost recovery and performance review proceedings. IUB staff have also used data available from public sources, principally the U. S. Department of Energy’s Energy Information Administration (EIA). Some of these data may not precisely match utilities’ numbers for certain parameters, such as peak electricity load, due to differing definitions of timeframes or jurisdictions. IUB staff has endeavored to assemble the data in time series, extending back to the beginning of energy efficiency programs authorized by Iowa Code § 476.6(19), enacted in 1990. Some utilities’ programs for load management (also known as “demand response programs”) existed prior to 1990 and the utilities reported their accumulated results in the first reports submitted in the early 1990s. IUB staff has compiled the data for the results of the utilities’ programs in parallel time series, showing the year-to-year impacts (incremental savings), and the accumulated annual impacts (cumulative savings). Staff has made no attempt to account for attrition of impacts or savings from early results. In some cases utilities’ data included the effects of attrition, in other cases attrition parameters were not applied.

•

•

•

•

1

Table of Contents.
• • • • • • • • • • Slide 3: Chart - Iowa utilities’ peak MW savings from energy efficiency and load management. Slide 4: Chart - IOU MW saved versus peak MW load. Slide 5: Chart - Iowa utilities’ electric MWh savings from energy efficiency programs. Slide 6: Chart - IOU cumulative annual natural gas savings (Mcf) from energy efficiency. Slide 7: Chart - IOU incremental annual natural gas savings, 1999 – 2005. Slide 8: Chart - Iowa energy efficiency spending by utilities. Slide 9: Table of energy efficiency spending by IOUs, municipal utilities and RECs. Slide 10: Table comparing IOU electric energy efficiency MWh savings to total and retail MWh sales. Slide 11: Table comparing IOU natural gas energy efficiency Mcf savings to total throughput and retail sales of Mcf. Slides 12-13: Contacts and Sources.

2

Iowa utilities have saved substantial amounts of peak electric use, typically defined as the maximum hourly electric load at the time of system peak. IUB staff compiled utilities’ data to show the buildup of savings up over the 16 year reporting timeframe, by the three types of utilities. For sources and notes, see page ?? of this presentation.
Cumulative Peak Electric Capacity Savings - MW 1990 1991 1992 1993 Investor-Owned Utilities Municipal Utilities Electric Cooperatives Totals 103 45 22 170 125 90 27 242 189 121 26 336 412 152 35 599 1994 501 189 34 724 1995 582 231 37 850 1996 630 246 60 1997 691 264 65 1998 723 277 68 1999 711 299 75 2000 757 311 76 2001 785 323 83 2002 774 337 100 2003 825 352 104 2004 969 378 103 2005 953 404 107

936 1,020 1,068 1,085 1,145 1,190 1,211 1,281 1,449 1,464

Peak Megawatts (MW) 1,600

IOWA Utilities' Peak MW Savings - Cumulative
Electric Cooperatives

1,400

Municipal Utilities
1,200

Investor-Owned Utilities

1,000

800

600

400

200

0 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

3

Investor-Owned Utilities (IOUs) have helped to mitigate increases in electric peak load through their energy efficiency programs. Peak load data in the following table and chart were compiled from the IOU reports to the EIA, which defines peak load as ????

1990 1991 IOU Summer Noncoincident Peak Load NA NA IOU Peak Load Management 100 116 IOU Energy Efficiency 3 9 IOU Pk LM MW as % of Peak IOU Energy Efficiency MW as % of PK Total LM and EE as % of Peak MW

1992 5,185 170 19 3% 0% 4%

1993 5,931 375 37 6% 1% 7%

1994 5,954 438 63 7% 1% 8%

1995 6,388 489 93 8% 1% 9%

1996 6,367 506 123 8% 2% 10%

1997 6,340 545 146 9% 2% 11%

1998 6,578 559 164 8% 2% 11%

1999 6,840 529 182 8% 3% 10%

2000 6,710 550 207 8% 3% 11%

2001 6,917 550 234 8% 3% 11%

2002 6,986 509 265 7% 4% 11%

2003 7,058 519 307 7% 4% 12%

2004 6,911 609 360 9% 5% 14%

2005 7,600 527 425 7% 6% 13%

IOU MW saved vs. Peak Load MW
9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

IOU Energy Efficiency IOU Peak Load Management IOU Summer Noncoincident Peak Load

Peak MW

4

Iowa utilities’ energy efficiency programs have also saved substantial amounts of electrical energy, shown here as megawatt-hours (MWh). The following table and chart shows how these savings have accumulated to nearly 2,000,000 MWh over the past 16 years.
Iowa Utilities' Cumulative Annual Energy Savings - MWh 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Investor-Owned Utilities 6,820 31,125 66,035 146,006 259,219 391,376 499,776 592,218 660,654 722,322 Municipal Utilities 23,645 47,290 55,656 64,021 73,820 83,227 89,925 96,882 100,010 104,196 Electric Cooperatives 13,902 19,585 22,697 28,464 38,817 46,765 58,923 68,672 76,031 82,948 Totals
44,367 98,000 144,388 238,491 371,856 521,368 648,624 757,772 836,695

2000
827,097 111,766 83,801

2001
123,705 94,396

2002
132,504 102,127

2003
142,403 114,545

2004
151,489 126,588

2005
162,313 145,808

939,873 1,056,968 1,219,250 1,417,309 1,642,072

909,466 1,022,664 1,157,974 1,291,600 1,476,199 1,695,386 1,950,193

Megawatt-Hours (MWh)

Iowa Utilities' Electric MWh Savings
2,500,000

Electric Cooperatives
2,000,000

Municipal Utilities Investor-Owned Utilities

1,500,000

1,000,000

500,000

0 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

5

Iowa utilities’ energy efficiency programs have included programs to save natural gas from the start in 1990. Most of the savings have been achieved by the Investor-Owned Utilities, consistent with the fact that most retail natural gas in Iowa is sold by IOUs.

IOWA IOU GAS ENERGY SAVINGS CUMULATIVE GAS SAVINGS Units = Dekatherms (Dth) or MMBTU (1,000,000 British Thermal Units) or MCF (1,000 Cubic Feet)
1990 1991 1992 1993
541,820 30,512 82,876

1994
888,525 60,717 197,144

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

Residential Energy Efficiency Low-income Energy Efficiency Nonresidential Energy Efficiency

240 0 149 389

1,920 225,296 0 1,079 9,594 18,752

1,277,414 1,663,132 2,006,186 2,343,223 2,706,472 3,013,247 3,481,393 3,875,115 4,328,772 4,835,197 5,459,960 78,708 248,880 95,933 298,033 114,481 360,280 134,800 406,071 156,433 443,404 180,306 644,968 201,496 733,798 221,888 828,582 241,596 264,964 301,501

975,418 1,106,510 1,317,352

2,999 253,642

655,208 1,146,386

1,605,002 2,057,098 2,480,946 2,884,094 3,306,309 3,838,520 4,416,687 4,925,586 5,545,786 6,206,671 7,078,813

M Cf 8,000,000

IOU Natural Gas Av oide d Purchase s Due to Ene rgy Efficie ncy Cumulativ e Ye arly Program Sav ings Units = M CF (1,000 Cubic Fe e t)

7,000,000

Nonresidential Energy Efficiency Low-income Energy Efficiency

6,000,000

Residential Energy Efficiency
5,000,000

4,000,000

3,000,000

2,000,000

1,000,000

0 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

6

Investor-owned utilities have achieved increased levels of new (incremental) natural gas savings in recent years. Most of the savings have been achieved in the residential sector, but nonresidential gas energy efficiency is increasing as well. The jump in nonresidential savings for 2000 may have been due to completion of several large projects for institutional customers of one utility.

INCREMENTAL GAS SAVINGS

Units = Dekatherms (Dth) or MMBTU (1,000,000 British Thermal Units) or MCF (1,000 Cubic Feet) 1999 2000 306,775 23,872 201,564 532,211 2001 468,146 21,190 88,830 578,167 2002 393,722 20,392 94,784 508,899 2003 453,656 19,708 146,836 620,201 2004 506,425 23,367 131,092 660,884 2005 624,764 36,537 210,841 872,142

Residential Energy Efficiency Low-income Energy Efficiency Nonresidential Energy Efficiency Total Incremental (NEW) Savings

363,249 21,633 37,333 422,215

M Cf 1,000,000 900,000 800,000

IOU Natural Gas Avoided Purchases Due to Energy Efficiency Annual NEW Program Savings Units = MCF (1,000 Cubic Feet)

Nonresidential Energy Efficiency Low-income Energy Efficiency Residential Energy Efficiency

700,000 600,000 500,000 400,000 300,000 200,000 100,000 0 1999 2000 2001 2002 2003 2004 2005

7

Funding for energy efficiency increased steadily through the middle 1990s, then declined somewhat as the debate over utility restructuring created uncertainty about treatment of funding. In 2001, legislative action ended the controversy and the Iowa Utilities Board directed IOUs to expand energy efficiency programs. New IOU plans were approved in 2003, and IOU funding increased substantially.

Nominal Dollars

Iowa Energy Efficiency Spending

120,000,000

REC Electric
100,000,000

Muni Elec & Gas IOU Gas IOU Electric

80,000,000

60,000,000

40,000,000

20,000,000

0 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

8

The investment by Iowa utilities in energy efficiency has grown substantially over the past 16 years. Funding from the Investor-Owned Utilities (IOUs) has recently increased, due to several factors.

The Iowa Utilities Board has made energy efficiency a high priority, and the IOUs have responded with increased funding for both electric and natural gas energy efficiency. In addition, one IOU received approval to recover costs through its energy efficiency plan for its substantial program of load management for nonresidential customers.
The table below does not include the investments made by utility customers who participate in energy efficiency programs. IOU programs typically provide incentives to customers for only about 50 percent of the extra cost of the energy efficiency features of new, efficient equipment or buildings. Approximately 80 percent of IOU funding goes to customer incentives.
1990 IOU Electric IOU Gas Muni Elec & Gas REC Electric IOUs 3,676,984 470,433 3,222,000 2,359,000 1991 12,653,750 2,466,603 3,222,000 2,648,000 1992 18,217,191 9,061,927 3,218,000 3,613,000 1993 28,930,343 14,105,425 3,218,000 3,981,000 1994 39,795,543 14,894,152 2,098,000 4,863,000 1995 40,950,794 16,424,637 1,741,000 5,128,000 1996 37,251,153 12,557,817 2,108,000 4,901,000 1997 31,358,794 11,342,654 2,144,000 5,459,000 1998 30,460,508 10,236,051 2,144,000 5,562,000 1999 27,598,264 10,428,062 3,477,638 5,952,581

4,147,417 15,120,353 27,279,118 43,035,767 54,689,695 57,375,432 49,808,970 42,701,448 40,696,560 38,026,326

2000 2001 2002 2003 IOU Electric 27,500,209 33,451,732 33,697,482 46,578,055 IOU Gas 13,473,620 18,010,597 17,136,016 22,236,361 Muni Elec & Gas 2,505,633 2,205,363 2,770,161 2,631,467 REC Electric 5,898,848 6,875,994 7,162,989 7,401,530 IOUs

2004 66,527,777 22,687,726 2,564,679 7,422,615

2005 70,992,471 28,298,984 2,560,587 8,106,643

40,973,829 51,462,328 50,833,498 68,814,416 89,215,502 99,291,455

9

IOU electric energy efficiency programs have significantly increased as a percentage of total megawatt-hours, over the past six years. Incremental or “NEW” electric energy efficiency investments provided between 0.5 and 0.7 percent of the total electricity used by customers of IOUs in 2005. The cumulative total savings for IOUs increased to 4 percent or 5.3 percent of IOU electricity sales in 2005.
COMPARISONS OF IOU ENERGY EFFICIENCY MWH TO ANNUAL SALES OF MWH Investor-Owned Utilities (IOU) Annual Energy Sales - MWh - 2000 - 2005 1999 2000 2001 2002 2003 2004 2005 IOU Total MWh Sales 37,356,492 37,284,773 37,793,786 39,717,541 39,868,388 39,497,381 41,102,476 IOU "Retail" MWh Sales 27,828,828 28,375,200 27,905,627 28,503,583 28,629,551 28,854,160 30,634,451

IOU Incremental EE - % of MWh IOU Incremental Energy Efficiency MWh IOU INCR. EE MWh % of Total MWh IOU INCR. EE MWh % of "Retail" MWh

1999 61,667 0.17% 0.22%

2000 104,775 0.28% 0.37%

2001 112,776 0.30% 0.40%

2002 117,095 0.29% 0.41%

2003 162,281 0.41% 0.57%

2004 198,059 0.50% 0.69%

2005 224,763 0.55% 0.73%

IOU Cumulative Annual EE - % of MWh IOU Cumulative Energy Efficiency MWh IOU CUM. EE MWh % of Total MWh IOU CUM. EE MWh % of "Retail" MWh

1999 722,322 1.93% 2.60%

2000 827,097 2.22% 2.91%

2001

2002

2003

2004

2005

939,873 1,056,968 1,219,250 1,417,309 1,642,072 2.49% 3.37% 2.66% 3.71% 3.06% 4.26% 3.59% 4.91% 4.00% 5.36%

10

IOU natural gas energy efficiency programs have also increased as a percentage of both total gas “throughput”, and as a percentage of retail sales. Incremental or “NEW” natural gas efficiency investments provided between 0.3 and 0.8 percent of the total natural gas used by customers of IOUs in 2005. The cumulative total savings natural gas savings increased to between 3 percent and 6 percent of IOU throughput or retail sales in 2005.

COMPARISONS OF IOU ENERGY EFFICIENCY MCF TO ANNUAL SALES OF MCF Investor-Owned Utilities (IOU) Annual Natural Gas "Throughput" and Retail Sales - Mcf - 2000 - 2005 1999 2000 2001 2002 2003 2004 2005 IOU Total "Throughput" * 214,438,820 215,553,232 255,588,651 243,309,555 239,292,848 235,649,075 241,193,957 IOU "Retail" Mcf Sales 109,426,702 113,630,797 108,531,611 109,023,395 112,593,709 105,281,702 104,513,895 * Throughput for IOUs includes large amounts of gas transported over the IOU gas distribution system to customers buying gas directly from non-utility suppliers, such as well-head producers or gas marketers. IOU Incremental EE - % of Mcf IOU Incremental En Effic Mcf IOU EE Mcf % of Total Mcf IOU EE Mcf % of "Retail" Mcf 1999 422,215 0.20% 0.39% 2000 532,211 0.25% 0.47% 2001 578,167 0.23% 0.53% 2002 508,899 0.21% 0.47% 2003 620,201 0.26% 0.55% 2004 660,884 0.28% 0.63% 2005 872,142 0.36% 0.83%

IOU Cumulative EE - % of Mcf IOU Cumulative En Effic Mcf IOU CUM. EE Mcf % of Total Mcf IOU CUM. EE Mcf % of "Retail" Mcf

1999 3,306,309 1.54% 3.02%

2000 3,838,520 1.78% 3.38%

2001 4,416,687 1.73% 4.07%

2002 4,925,586 2.02% 4.52%

2003 5,545,786 2.32% 4.93%

2004 6,206,671 2.63% 5.90%

2005 7,078,813 2.93% 6.77%

11

Contacts and Sources.
For persons with questions about these slides or for electronic copies of the spreadsheets, contact: Gordon Dunn Iowa Utilities Board 350 Maple Street Des Moines, Iowa 50319 Phone: 515-281-7051 E-mail: Gordon.Dunn@iub.state.ia.us

Sources - IES - 1990-1998: IES Utilities "Energy Efficiency Program Capacity and Energy Savings Summary” Docket No. EEP--95-1, Energy Efficiency Status Report, filed 9/24/98. Updated by E-Mail Attachment from Steve Mohasci, IES, 9/27/99.

Source - Alliant/IPL 1999-2003: Annual reports for 2002 and 2003, filed in Docket No. EEP-02-38, submitted with revisions, March 25, 2005. Sources - Alliant/IPL 2004-2005: Annual reports for 2004 and 2005, filed in Docket No. EEP-02-38, May 2, 2005, and May 1, 2006.

12

Sources – Continued.
Sources: Iowa Power, Iowa Public Service (IPS), Iowa-Illinois Gas and Electric, and successor MidAmerican Energy. 1990-1996, (Iowa Power, IPS, Iowa-Illinois) - From data provided by MidAmerican Energy Company (MEC), November 17, and December 2, 1997. 1997-1998, (MEC) - From MEC responses to IUB staff information requests, received on October 22, October 28, and November 3, 1999, from David Fischer. 1999-2000, (MEC) MEC Monitoring reports, filed in Docket No. EEP-95-3, January 31, 2000 and February 13, 2001. 2001-2002, (MEC) MEC Monitoring report, filed in Docket No. EEP-95-3, February 4, 2002. 2003 2004 2005 (MEC) MEC Annual Report, filed in Docket No. EEP-03-1, May 1, 2004. MEC Annual Report, filed in Docket No. EEP-03-1, May 1, 2005. MEC Annual Report, filed in Docket No. EEP-03-1, May 1, 2005.

Sources: Peoples Natural Gas Company 1990-1998, Docket Nos. ECR-93-3, filing of 8/15/94 and ECR-96-2, filing of 11/15/9.
Sources : Aquila, Inc. 1999-2004 Aquila Annual Report including data for 1999-2004, filed May 1, 2005, in Docket No. EEP-03-4. Aquila 2005 Annual Report, filed May 1, 2006, in Docket No. EEP-03-4.

Sources: United Cities Gas and Atmons Energy: Electronic filing of information by United Cities, 9/22/00.
Atmos Annual Report for 1999-2003, May 3, 2004, Docket No. EEP-03-3. Atmos Annual Report for 2004, May 9, 2005, Docket No. EEP-03-3.

13


								
To top